You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
52 lines
803 B
52 lines
803 B
INCLUDE "hardware.inc"
|
|
INCLUDE "png/map/intro.inc"
|
|
|
|
SECTION "BG Data", WRAM0
|
|
|
|
BG_COLLISION_DATA:: dw
|
|
BG_MAP_WIDTH:: db
|
|
|
|
SECTION "BG Code", ROM0
|
|
|
|
MACRO update_map_info
|
|
ld hl, BG_COLLISION_DATA
|
|
ld a, HIGH(\1)
|
|
ld [hli], a
|
|
ld a, LOW(\1)
|
|
ld [hli], a
|
|
|
|
ld a, \2
|
|
ld [hli], a
|
|
ENDM
|
|
|
|
BG_Init::
|
|
; copy map
|
|
ld e, intro_HEIGHT
|
|
ld bc, _SCRN0
|
|
ld hl, intro_MAP
|
|
.copy_map_row:
|
|
ld d, intro_WIDTH
|
|
call memcpy
|
|
dec e
|
|
jr z, .done
|
|
ld d, 32 - intro_WIDTH
|
|
.skip:
|
|
; skip over trailing part in vram
|
|
inc c
|
|
jr nz, .nocarry
|
|
inc b
|
|
.nocarry:
|
|
dec d
|
|
jr nz, .skip
|
|
jr .copy_map_row
|
|
.done:
|
|
|
|
; copy tiles
|
|
ld hl, intro_TILES
|
|
ld bc, _VRAM
|
|
ld d, intro_NUM_TILES
|
|
call memcpy
|
|
|
|
update_map_info intro_COLLISION, intro_WIDTH
|
|
|
|
ret
|